ECEN 4005 Photovoltaics Devices F15
Homework #7
Due Friday, October 30
(Each problem is worth 5 points unless otherwise notes)
1. Silicon in and out of equilibrium. A semiconductor is no longer in equilibrium if it is
subject to a perturbation such as an

ECEN 4005 Photovoltaics Devices F15
Homework #8
Due Wednesday, November 11
(Each problem is worth 5 points unless otherwise notes)
1. Optical absorption in crystalline silicon.
The absorption coefcient (E) of an indirect band gap semiconductor follows the

ECEN 4005 Photovoltaic Devices F15
Homework #2
Due Wednesday, September 9
(Each problem is worth 5 points unless otherwise notes)
1. J-V Curves and Device Efciency. Posted is JV device data for a typical (early
generation) OPV device. The data le (Excel f

ECEN 4005 Photovoltaics Devices F15
Homework #6
Due Wednesday, October 7
(Each problem is worth 5 points unless otherwise notes)
1. Carrier concentration in doped silicon (2nd time around). A silicon sample is
doped with 1014 cm-3 boron atoms. In Homework

ECEN 4005 Photovoltaics Devices F15
Homework #4
Due Wednesday, September 23
(Each problem is worth 5 points unless otherwise notes)
1. Impact of Rs and Rsh on device efciency. In this problem you will quantify the
impact Rs and Rsh on device efciency, in

ECEN 4005 Photovoltaics Devices F15
Homework #5
Due Wednesday, September 30
(Each problem is worth 5 points unless otherwise notes)
1. Position of the Fermi Energy in an intrinsic (undoped) semiconductor.
In an undoped semiconductor, he probability that

ECEN 4005 Photovoltaic Devices F15
Homework #1
Due Monday, August 31
(Each problem is worth 5 points unless otherwise notes)
1. Examining the equivalent circuit diagram below, nd an expression for the I-V
relationship for the device assuming both Rs and R

ECEN 4005 Photovoltaics Devices F15
Homework #3
Due Wednesday, September 16
(Each problem is worth 5 points unless otherwise notes)
1. Photovoltaic efciency limit as a function of both Eg and light intensity.
Extending the work you did in Homework 2-2, ma